Wu, Yong-gui and Lin, Chu-xia and Liu, Yong and Lu, Wen-zhou (2007) Physicochemical characteristics and biotoxicity of water-soluble acid mine wastes from the Dabaoshan mining district. Acta Mineralogica Sinica, 27 (3/4). pp. 549-557. ISSN 1000-4734
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Physicochemical analysis and bioinstrumentation have been conducted to investigate the physicochemical characteristics and biotoxicity of water-soluble acid mine wastes (AMW) in the soil layer from the Dabaoshan mining district. The results showed that the composition of the minerals could be comparatively complicated, and the minerals contain a lot of reducing sulfides and other acid matter and heavy metals. The minerals are unstable and extremely easy to dissolve in water. The pH of the solution could be as low as 2.15 with high concentrations of the heavy metals, Fe and Mn, in the solution of AMW. The concentrations of Cu, Zn, Cd, Pb, Mn and Fe in the solution were 419.5 mg/L, 0. 974mg/L, 462.8 mg/L, 0.204 mg/L, 149000 mg/L and 174.4 mg/L, respectively. The biomonitoring results showed that there was severe biotoxicity to Daphnian in the solution of AMW. A survey found no animal even in case that the pH of the solution of AMW increased from 2.15 to 7.22 by ISO-water neutralization. This indicated that the toxicity of AMW is related mainly to acid, which was also influenced significantly by the concentrations of coexisting heavy metals. It seems reasonable to suggest that the AMW from the Dabaoshan mining district could cause severe damage to the downstream aquatic ecosystem.
|Item Type:||Article (Commonwealth Reporting Category C)|
|Additional Information:||c. Kuangwu Xuebao. Text in Chinese.|
|Uncontrolled Keywords:||acide mine waste; AMW; heavy metal; biotoxicity; Daphnia carinata|
|Fields of Research (FOR2008):||05 Environmental Sciences > 0503 Soil Sciences > 050304 Soil Chemistry (excl. Carbon Sequestration Science)|
04 Earth Sciences > 0406 Physical Geography and Environmental Geoscience > 040699 Physical Geography and Environmental Geoscience not elsewhere classified
05 Environmental Sciences > 0503 Soil Sciences > 050302 Land Capability and Soil Degradation
|Socio-Economic Objective (SEO2008):||D Environment > 96 Environment > 9609 Land and Water Management > 960908 Mining Land and Water Management|
|Deposited On:||08 Nov 2012 10:20|
|Last Modified:||08 Nov 2012 10:20|
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